The speed of sound V near the Earth's surface can be represented by this equation,V = 20 times the square root of t + 273 , where t is the temperature in degrees Celsius. Find the temperature when V = 380 meters per second. Round to the nearest whole number.
A. 88
B. 90
C. 92
D. 94

Question

The speed of sound V near the Earth's surface can be represented by this equation,V = 20 times the square root of t + 273 , where t is the temperature in degrees Celsius. Find the temperature when V = 380 meters per second. Round to the nearest whole number.
	A.	88
	B.	90
	C.	92
	D.	94

anonymous · Answer

$$V=20\sqrt{t+273} is the problem for the question. $$

anonymous · Answer

is the problem for the question**

anonymous · Answer

$$380=20\sqrt{t+273}$$

anonymous · Answer

I don't get it.. :/

anonymous · Answer

$$380=20\sqrt{t+273}$$
divide 20 on both sides
$$19=\sqrt{t+273}$$
square them so the radical cancel out
$$19^2=(\sqrt{t+273})^2$$
$$361=t+273$$
88=t